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Acquisitions Acquisitions - Narrative (Details) | 12 Months Ended | 0 Months Ended | 12 Months Ended |  | 0 Months Ended | 12 Months Ended |  | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | May 03, 2012 AmniSure [Member] USD ($) | Dec. 31, 2012 Intelligent Bio Systems, Inc. [Member] USD ($) | Dec. 31, 2012 Cellestis [Member] USD ($) | Dec. 31, 2011 Cellestis [Member] USD ($) | Aug. 29, 2011 Cellestis [Member] USD ($) | Jul. 12, 2011 Ipsogen [Member] USD ($) | Jul. 12, 2011 Ipsogen [Member] EUR (€) | Dec. 31, 2012 Ipsogen [Member] USD ($) | Dec. 31, 2011 Ipsogen [Member] USD ($) Biomarker | Dec. 31, 2011 Cellestis and Ipsogen [Member] USD ($) | Dec. 31, 2010 Cellestis and Ipsogen [Member] USD ($) | Dec. 31, 2011 Series of Individually Immaterial Business Acquisitions [Member] USD ($) | Dec. 31, 2010 ESE GmbH and IFP [Member] USD ($) | Dec. 31, 2012 Developed Technology, Licenses, and Know How [Member] Cellestis [Member] USD ($) | Dec. 31, 2012 Developed Technology, Licenses, and Know How [Member] Ipsogen [Member] USD ($) | Dec. 31, 2012 Customer Relationships [Member] Cellestis [Member] USD ($) | May 03, 2012 Minimum [Member] AmniSure [Member] | Dec. 31, 2012 Minimum [Member] Intelligent Bio Systems, Inc. [Member] | Dec. 31, 2011 Minimum [Member] Series of Individually Immaterial Business Acquisitions [Member] | May 03, 2012 Maximum [Member] AmniSure [Member] | Dec. 31, 2012 Maximum [Member] Intelligent Bio Systems, Inc. [Member] | Dec. 31, 2011 Maximum [Member] Series of Individually Immaterial Business Acquisitions [Member] | Jul. 12, 2011 Ipsogen [Member] USD ($) | Jul. 12, 2011 Ipsogen [Member] EUR (€) | Dec. 31, 2011 First Milestone [Member] Series of Individually Immaterial Business Acquisitions [Member] USD ($) | Dec. 31, 2011 Second Milestone [Member] Series of Individually Immaterial Business Acquisitions [Member] USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 10 years 4 months 24 days |  |  | 9 years 6 months |  | 9 years 11 months 15 days |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets, Noncurrent |  |  |  |  |  |  |  |  |  |  | $ 9,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  | 300,000 | 8,100,000 | 6,200,000 |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs | 4,500,000 |  |  |  |  |  | 5,800,000 |  |  |  |  | 5,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liabilities Noncurrent |  |  |  |  |  | 3,900,000 |  |  |  |  | (2,800,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets, Liabilities, Net |  |  |  |  |  | 1,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Purchase Accounting Adjustments | 70,034,000 | (615,000) |  |  |  | 12,000,000 |  |  |  |  | 14,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of contingent consideration | 19,000,000 |  |  | 4,530,000 | 12,000,000 |  |  |  |  |  |  |  |  |  | 6,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount Rate Used To Derive Fair Value Of Milestone Payments Of Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.70% | 0.70% |  | 2.00% | 1.60% |  |  |  | 1.70% | 3.25%
Probability Used To Derive Accomplishment Of Milestones Of Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 95.00% | 90.00% |  | 100.00% | 100.00% |  |  |  |
Business Acquisition, Contingent Consideration, Potential Cash Payment |  |  |  | 35,000,000 | 12,500,000 |  |  |  |  |  |  |  |  |  | 44,000,000 | 8,100,000 |  |  |  |  |  |  |  |  |  |  |  | 5,500,000 | 1,400,000
Payments to Acquire Businesses, Gross |  |  |  |  | 31,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amounts held in escrow in connection with acquisitions | 7,521,000 | 7,026,000 |  |  | 5,200,000 |  |  |  |  |  |  |  |  |  | 8,500,000 | 2,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Contingent Consideration in a Business Combination | 7,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  | 101,415,000 |  | 372,452,000 |  | 372,500,000 |  |  | 57,436,000 |  |  |  |  | 22,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Biomarkers |  |  |  |  |  |  |  |  |  |  |  | 15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination Step Acquisition Equity Interest in Acquiree Payment |  |  |  |  |  |  |  |  | 57,400,000 | 40,900,000 | 29,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  | 62.60% | 62.60% | 89.40% |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of remaining shares |  |  |  |  |  |  |  |  |  |  | 42,437,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding Shares and Other Equity Instruments, Fair Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 99,900,000 | 70,200,000 |  |
Net sales | 1,254,456,000 | 1,169,747,000 | 1,087,431,000 |  |  |  |  |  |  |  |  |  | 28,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to the owners of QIAGEN N.V. | 129,506,000 | 96,038,000 | 144,311,000 |  |  |  |  |  |  |  |  |  | 1,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Pro Forma Revenue |  |  |  |  |  |  |  |  |  |  |  |  | 1,213,500,000 | 1,140,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Pro Forma Net Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  | 91,900,000 | 139,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Pro Forma Earnings Per Share, Diluted |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.38 | $ 0.58 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | $ 131,997,000 | $ 457,483,000 | $ 36,985,000 |  |  |  |  |  |  |  |  |  |  |  | $ 47,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 65 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6910684&loc=d3e4570-128470 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(3),(c)(1) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6411-128476 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 25 -Paragraph 27 -URI http://asc.fasb.org/extlink&oid=6946367&loc=d3e3629-128468 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 25 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6946367&loc=d3e3642-128468 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 29, 30, 41, 42, 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 30 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=18499824&loc=d3e4243-128469 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 30 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=18499824&loc=d3e4237-128469 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 40 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6910732&loc=d3e4805-128471 + Details
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- Definition Amount of cash paid to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Percentage of voting equity interests acquired in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 54 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 55 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph r(2, 3) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph p(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 59 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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